Index: trunk/tutorial/model_tutorial.tex
===================================================================
--- trunk/tutorial/model_tutorial.tex	(revision 10)
+++ trunk/tutorial/model_tutorial.tex	(revision 11)
@@ -59,4 +59,15 @@
 
 \subsection{Layers}
+Open user\_content.txt using a spreadsheet and edit the thematic\_layers part. Each of the layers that we want to export should appear here. The structure is as follows (see figure ???):
+\begin{description*}
+  \item [LAYER\_INDEX] unique identifier of the layer
+  \item [TYPE\_CD] layer spatial type as follow
+    \begin{description*}
+      \item [0] Line
+      \item [1] Point
+      \item [2] Polygon
+    \end{description*}
+  \item [LAYER\_NAME] the layer name. This name will be given to the SHP file when exporting
+\end{description*}
 
 \subsection{Objects}